基于虚拟帐号的邮件系统(extmail)上

构想图:

151911857.jpg

所需主要源码包:
postfix-2.8.2.tar.gz
courier-authlib-0.63.0.tar.bz2
extmail-1.2.tar.gz,
extman-1.1.tar.gz
Unix-Syslog-0.100.tar.gz
一、安装前的准备工作:

1、安装dns服务 yum install bind  bind-chroot  caching-nameserver

域名为liuyuan.com  192.168.1.160

主机名为mail.liuyuan.com

2、安装所需的rpm包,这包括以下这些:

httpd, php, php-mysql, mysql, mysql-server, mysql-devel, openssl-devel, dovecot, perl-DBD-MySQL, tcl, tcl-devel, libart_lgpl, libart_lgpl-devel, libtool-ltdl, libtool-ltdl-devel, expect

yum install httpd  php  php-mysql  mysql  mysql-server  mysql-devel  openssl-devel  dovecot  perl-DBD-MySQL  tcl  tcl-devel  libart_lgpl  libart_lgpl-devel libtool-ltdl  libtool-ltdl-devel  expect

3、关闭sendmail,并将它的随系统自动启动功能关闭:

# service sendmail stop

# chkconfig sendmail off

4、安装以下开发所用到的rpm包组:通过yum grouplist 查看

Development Libraries

Development Tools

Legacy Software Development

X Software Development

注:对应成中文就是:Development Libraries  开发库; Development Tools 开发工具;

Legacy Software Development 老的软件开发; X Software Development  X软件开发;

方法:

# yum groupinstall "packge_group_name"

5、启动mysql数据库,并给mysql的root用户设置密码:

# service mysqld start

# chkconfig mysqld on

---------------------------------授权本地用户

mysql> SET  PASSWORD FOR root@'localhost'=PASSWORD('redhat');

mysql> SET  PASSWORD FOR root@'127.0.0.1'=PASSWORD('redhat');

mysql> FLUSH PRIVILEGES;

-------------------------------授权远程用户

mysql> GRANT  ALL PRIVILEGES ON *.* TO root@'%' IDENTIFIED BY 'redhat';

mysql> FLUSH PRIVILEGES;

二、安装配置postfix

1、创建相关用户及组并指定自定义用户id及组id

# groupadd -g 2525 postfix

# useradd -g postfix -u 2525 -s /sbin/nologin -M postfix

# groupadd -g 2526 postdrop

# useradd -g postdrop -u 2526 -s /bin/false -M postdrop

# tar zxvf postfix-2.6.5.tar.gz

# cd postfix-2.6.5

# make makefiles 'CCARGS=-DHAS_MYSQL -I/usr/include/mysql -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I/usr/include/sasl  -DUSE_TLS ' 'AUXLIBS=-L/usr/lib/mysql -lmysqlclient -lz -lm -L/usr/lib/sasl2 -lsasl2   -lssl -lcrypto'

# make

# make install

按照以下的提示输入相关的路径([]号中的是缺省值,”[]”后的是输入值,省略的表示采用默认值)

install_root: [/] /

tempdir: [/usr/local/src/ postfix-2.6.5] /tmp

config_directory: [/etc/postfix] /etc/postfix

daemon_directory: [/usr/libexec/postfix]

command_directory: [/usr/sbin]

   data_directory: [/var/lib/postfix]

queue_directory: [/var/spool/postfix]

sendmail_path: [/usr/sbin/sendmail]

newaliases_path: [/usr/bin/newaliases]

mailq_path: [/usr/bin/mailq]

mail_owner: [postfix]

setgid_group: [postdrop]  

   html_directory: [no] /var/www/html/help   #帮助文档

   manpages: [/usr/local/man]

   readme_directory: [no]

生成别名二进制文件,这个步骤如果忽略,会造成postfix效率极低:

#  newaliases

2.进行一些基本配置,测试启动postfix并进行发信

#vi /etc/postfix/main.cf

修改以下几项为您需要的配置

myhostname = mail.liuyuan.com

myorigin = liuyuan.com

mydomain = liuyuan.com

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

mynetworks = 192.168.1.0/24, 127.0.0.0/8

说明:

myorigin参数用来指明发件人所在的域名;

mydestination参数指定postfix接收邮件时收件人的域名,即您的postfix系统要接收到哪个域名的邮件;

myhostname 参数指定运行postfix邮件系统的主机的主机名,默认情况下,其值被设定为本地机器名;

mydomain参数指定您的域名,默认情况下,postfix将myhostname的第一部分删除而作为mydomain的值;

mynetworks 参数指定你所在的网络的网络地址,postfix系统根据其值来区别用户是远程的还是本地的,如果是本地网络用户则允许其访问;

inet_interfaces 参数指定postfix系统监听的网络接口;

注意:

1、在postfix的配置文件中,参数行和注释行是不能处在同一行中的;

2、任何一个参数的值都不需要加引号,否则,引号将会被当作参数值的一部分来使用;

3、每修改参数及其值后执行 postfix reload 即可令其生效;但若修改了inet_interfaces,则需重新启动postfix;

4、如果一个参数的值有多个,可以将它们放在不同的行中,只需要在其后的每个行前多置一个空格即可;postfix会把第一个字符为空格或tab的文本行视为上一行的延续;

[root@localhost abc]# rpm2cpio postfix-2.3.3-2.1.el5_2.i386.rpm  |cpio -id

16333 blocks

[root@localhost etc]#cp  etc/init.d/rc.d/postfix  /etc/init.d/
[root@localhost etc]# ll /etc/init.d/postfix

-rwxr-xr-x 1 root root 2404 12-14 17:51 /etc/init.d/postfix

[root@localhost etc]# chkconfig --add postfix

[root@localhost etc]# chkconfig postfix on

152006288.jpg

启动postfix

#service postfix start

连接postfix,验正服务启动状况:

# telnet localhost 25

Trying 127.0.0.1...

Connected to localhost.localdomain (127.0.0.1).

Escape character is '^]'.

220 mail.liuyuan.com ESMTP Postfix

ehlo mail.liuyuan.com

250-mail.liuyuan.com

250-PIPELINING

250-SIZE 10240000

250-VRFY

250-ETRN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

mail from:[email protected]

250 2.1.0 Ok

250 2.1.5 Ok

data

354 End data with <CR><LF>.<CR><LF>

subject:test!

test!!!

.

250 2.0.0 Ok: queued as AB94A1A561

quit

221 2.0.0 Bye

Connection closed by foreign host.

切换到user1用户进行收信:

# su - user1

$ mail

Mail version 8.1 6/6/93.  Type ? for help.

"/var/spool/mail/user1": 1 message 1 new

>N  1 [email protected]        Wed Sep  5 10:59  15/488   "test!"

&

三、为postfix开启基于cyrus-sasl的认证功能

使用以下命令验正postfix是否支持cyrus的sasl认证,如果您的输出为以下结果,则是支持的:

# /usr/sbin/postconf  -a

cyrus

dovecot

#vi /etc/postfix/main.cf

添加以下内容:

############################CYRUS-SASL############################

broken_sasl_auth_clients = yes

smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject_invalid_hostname,reject_non_fqdn_hostname,reject_unknown_sender_domain,reject_non_fqdn_sender,reject_non_fqdn_recipient,reject_unknown_recipient_domain,reject_unauth_pipelining,reject_unauth_destination

smtpd_sasl_auth_enable = yes

smtpd_sasl_local_domain = $myhostname

smtpd_sasl_security_options = noanonymous

smtpd_banner = Welcome to our $myhostname ESMTP,Warning: Version not Available!

#vi /usr/lib/sasl2/smtpd.conf
添加如下内容:

pwcheck_method: saslauthd

mech_list: PLAIN LOGIN

启动saslauthd服务,并将其加入到自动启动队列:

# service saslauthd start

# chkconfig saslauthd on

重启postfix服务

#service postfix restart

# telnet localhost 25

Trying 127.0.0.1...

Connected to localhost.localdomain (127.0.0.1).

Escape character is '^]'.

220 Welcome to our mail.liuyuan.com ESMTP,Warning: Version not Available!

ehlo mail.test.com

250-mail.test.com

250-PIPELINING

250-SIZE 10240000

250-VRFY

250-ETRN

250-AUTH PLAIN LOGIN

250-AUTH=PLAIN LOGIN               (说明已经支持验证)

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

四、安装Courier authentication library

# tar jxvf courier-authlib-0.63.0.tar.bz2    -C  /usr/local/src/

# cd /usr/local/src/courier-authlib-0.63.0

#./configure --prefix=/usr/local/courier-authlib --sysconfdir=/etc --with-authmysql --with-mysql-libs=/usr/lib/mysql --with-mysql-includes=/usr/include/mysql --with-redhat --with-authmysqlrc=/etc/authmysqlrc --with-authdaemonrc=/etc/authdaemonrc --with-ltdl-lib=/usr/lib --with-ltdl-include=/usr/include

# make

# make install

# chmod 755 /usr/local/courier-authlib/var/spool/authdaemon

# cp /etc/authdaemonrc.dist  /etc/authdaemonrc

# cp /etc/authmysqlrc.dist  /etc/authmysqlrc

修改/etc/authdaemonrc 文件

authmodulelist="authmysql"

authmodulelistorig="authmysql"

daemons=10

编辑/etc/authmysqlrc 为以下内容,其中2525,2525 为postfix 用户的UID和GID。

MYSQL_SERVER localhost

MYSQL_PORT 3306                   (指定你的mysql监听的端口,这里使用默认的3306)

MYSQL_USERNAME  extmail      (这是为后文要用的数据库的所有者的用户名)

MYSQL_PASSWORD extmail        (extmail用户的密码)

MYSQL_SOCKET  /var/lib/mysql/mysql.sock

MYSQL_DATABASE  extmail

MYSQL_USER_TABLE  mailbox

MYSQL_CRYPT_PWFIELD  password

MYSQL_UID_FIELD  2525

MYSQL_GID_FIELD  2525

MYSQL_LOGIN_FIELD  username

MYSQL_HOME_FIELD  concat('/var/mailbox/',homedir)

MYSQL_NAME_FIELD  name

MYSQL_MAILDIR_FIELD  concat('/var/mailbox/',maildir)

#cd  /usr/local/src/courier-authlib-0.63.0

# cp courier-authlib.sysvinit /etc/init.d/courier-authlib

# chmod 755 /etc/init.d/courier-authlib

# chkconfig --add courier-authlib

# chkconfig --level 2345 courier-authlib on

加载courier-authlib的库文件,

#echo "/usr/local/courier-authlib/lib/courier-authlib" >> /etc/ld.so.conf.d/courier-authlib.conf

# ldconfig -v  |more      (查看是否正常加载相关库文件)

# service courier-authlib start   (启动服务)

Starting Courier authentication services: authdaemond

新建虚拟用户邮箱所在的目录,并将其权限赋予postfix用户:

#mkdir -pv /var/mailbox

#chown -R postfix /var/mailbox

接下来重新配置SMTP 认证,编辑 /usr/lib/sasl2/smtpd.conf ,确保其为以下内容:

pwcheck_method: authdaemond

log_level: 3

mech_list:PLAIN LOGIN

authdaemond_path:/usr/local/courier-authlib/var/spool/authdaemon/socket

#service saslauthd restart  (重启saslauthd服务)

五、让postfix支持虚拟域和虚拟用户

1、编辑/etc/postfix/main.cf,添加如下内容:

########################Virtual Mailbox Settings########################

virtual_mailbox_base = /var/mailbox

virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf

virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf

virtual_alias_domains =

virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf

virtual_uid_maps = static:2525

virtual_gid_maps = static:2525

virtual_transport = virtual

maildrop_destination_recipient_limit = 1

maildrop_destination_concurrency_limit = 1

##########################QUOTA Settings########################

message_size_limit = 14336000

virtual_mailbox_limit = 20971520

virtual_create_maildirsize = yes

virtual_mailbox_extended = yes

virtual_mailbox_limit_maps = mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf

virtual_mailbox_limit_override = yes

virtual_maildir_limit_message = Sorry, the user's maildir has overdrawn his diskspace quota, please Tidy your mailbox and try again later.

virtual_overquota_bounce = yes

2、使用extman源码目录下docs目录中的extmail.sql和init.sql建立数据库:

# tar zxvf  extman-1.1.tar.gz

# cd extman-1.1/docs

#cp mysql_virtual_* /etc/postfix/

----------将extmail.sql与init.sql导入到mysql数据库中---------------------------------------

# mysql -u root -p <extmail.sql

# mysql -u root -p <init.sql

#mysql -u root -p   (进行验证,查看是否导入成功)

152045390.jpg

3、授予用户extmail访问extmail数据库的权限

mysql> GRANT all privileges on extmail.* TO extmail@localhost IDENTIFIED BY 'extmail';

mysql> GRANT all privileges on extmail.* TO [email protected] IDENTIFIED BY 'extmail';

mysql>FLUSH PRIVILEGES;   让设置的内容生效

service  postfix  restart  (重启postfix服务)

注意:启用虚拟域以后,需要取消中心域,即注释掉myhostname, mydestination, mydomain, myorigin几个指令;

否则就会报错:

postfix/trivial-rewrite[12839]: warning: do not list domain liuyuan.com in BOTH mydestination and virtual_mailbox_domains

接下一篇……


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